Benjamin t



(No Model.)

B. T. BABBITT. STEAM GENERATOR.

Patented Aug. 24, 1886.

UNITE STATES PATENT OFFICE.

BENJAMIN T. BABBITT, OF NEW YORK, N. Y.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 348,093, dated August24, 1886.

Application filed January 8, 1886. Serial No. 187,946.

To all whom it may concern.-

Be it known that I, BENJAMIN T. BABBITT, of the city and county of NewYork, in the State of New York, have invented a new and usefulImprovement in Steam-Generators, of which the following is aspecification.

My invention relates to steam-generators which comprise a centralupright water-chambe'r and hollow arms, which project radially from saidchamber around its circumference, and in which a circulation of water isproduced by the heat from the fire below.

' The object of my invention is to utilize the space which lies betweenthe outwardly-pro jeeting radial arms of the central water-chain her,and thereby to produce a generator which will have a much greater amountof heating surface without increasing the external di meir sions of thegenerator.

The invention consists in the combination,

with a central upright water-chamber having a series of hollow armsprojecting radially from it, of upright water-chambers arranged betweensaid radial arms, near their outer ends, and also provided with hollowarms, which project radially inward toward the central water chamber. Bythis construction the space between the hollow radial arms of thecentral waterchamber is occupied by the water-chambers which arearranged between them, and are provided with inwardly-projeoting radialarms. The radial arms of the central waterchamber are preferably taperedin a direction away from said chamber, and the radial arms of the otherwater-chambers are tapered in a direction toward the centralwater-chamber.

In the accompanying drawings, Figure 1 is a vertical section of asteam-generator embodying my invention. Fig. 2 is a plan of the portionsthereof which contain water or steam; and Fig. 3 is a horizontal sectionupon the plane of the dotted line as m, Fig. 1.

Similar letters of reference designate corresponding parts in theseveral figures.

A designates the outer casing of the generator, in the lower part ofwhich is a grate or grates, a, which may be supplied with fuel throughsuitable'doors, b.

B designates a central upright water-chamber, which is supported upon apost or ped- (No model.)

estal, B. This central upright water-chamher is provided with hollowarms 0, which project from it radially outward, and which are here shownas tapered in a direction away from the central chamber, B. At the upperend of the central water-chamber, B, is a pipe, 0, through which steammay be supplied from the generator.

The generator also comprises a circular series of supplemental uprightwater-chambers, D, which are here shown as of cylindric form, and arearranged between the radial arms (3 of the central water-chamber, B, ata point near the outer ends of said arms, as best shown in Figs. 2 andThe generator may comprise any number of these supplementalwater-chambers D, according to the distance at which the radial armsGare arranged apart in a horizontal direction. The supplementalwaterchambers D are at their lower ends each connected bya pipe, (Z,with the central water-chamber, B, and at their upper ends are connectedby pipes c with the central waterchamber, so as to provide an outlet forthe steam which may be generated from the water in them. Thesupplemental water-chambers D are also provided with hollow arms D,which project inward radially toward the cen tral water-chamber, B, andthese arms also are tapered in a direction away from the water-chambersD, with which they communicate, and toward the central water-chamber, B.The tapering form of the radial arms 0 D promotes the circulation ofwater in them, and also economizes the space in the generator, inasmuchas the radial arms 0 are of largest diameter at the point where the,radial arms D are of smallest diameter, and vice versa.

I do not claim in my present invention a generator having an uprightcentral waterchamber and hollow arms projecting radially therefrom; butit will be readily seen that by the employment, in a generator, of thesupplemental npright waterchambersD, provided with radial arms D, Iobtain a large increase in the heating-surface of the generator withoutat all increasing the outside dimensions thereof. What I claim as myinvention, and desire to secure by Letters Patent, is-

1. The combination, in a steam-generator, .0 projecting radiallytherefrom and tapering with a central upright reservoir or waterin adirection away from the central chamber, chamber having series of hollowarms projectof upright water-chambers 1), arranged be- 15 ing radiallytherefrom, of upright reservoirs tween and near the ends of the radialarms 0,

5 or waterchambers arranged midway between and provided with hollowarmsD, which prothe said radial hollow arms, near their outer ject radiallyinward and taper in a direction ends, and each'provided with hollow armstoward the central chamber, B, substantially projecting radiallytherefrom inward toward as herein described.

the central reservoir orchamber, substantially B. T. BABBITT. 10 asherein described. \Vitnesses:

2. The combination, with the central up \V. J. STODDARD,

right water-chamber, 13, having hollow arms JOHN H. TWADDLE.

